Find the standard deviation to the given data. The manager of a small dry cleaner employs six people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they travel one way from home to work. THe six distances are listed:
17.5,12.5,26.0,32.2,17.7,20.1. Round the result to two decimal places.

so the mean that i got was 21
then I found the square of the number within the list and added the results then i used the formula to find variance.